Apparatus for cementing together cut-to-size shank upper material

ABSTRACT

An apparatus for bonding a shoe lining with a shank upper material, one of which is provided with a pressure-activated adhesive cement, which comprises bottom mold means for supporting the lining and shank material to be bonded; an upper mold means having an air intake means and an elastic means secured to said upper mold to define a chamber in communication with said air intake means, said chamber being expanded by introducing air through said intake means to press the elastic means against the shoe lining and shank material to effect bonding therebetween.

Elnited States Betke atent [1 1 [4 1 Sept. 11, 1973 APPARATUS FORCEMENTING TOGETHER CUT-TO-SIZE SHANK UPPER MATERIAL [75] Inventor: ErichBetke,Troisdorf-Spich,

Germany [73] Assignee: Dynamit Nobel Aktiengesellschaft,

Troisdorf, Germany 1221 Filed: Sept. 30, 1971 m Appl.N0.: 185,057

[30] Foreign Application Priority Data Sept. 30, 1970 Germany P 20 48021.1

521 Us. Cl. 12/52 [51] Int. Cl A43d 11/00 [58] Field of Search 12/1 R, 1W, 8.1, 12/52, 53.5, 54.2, 543,146 L, 54.1,] F, 133 B, 128 N [56]References Cited UNITED STATES PATENTS 3,160,899 12/1964 Bille et al..Q. 12/1 F 2,648,079 8/1953 Ushakoff 12 54.1 2,805,432 9 1957 Riggs2,962,734 12/1960 Lorenzo 12 1 F Primary Examiner-Patrick D. LawsonAttorneyCraig, Antonelli & Hill [57] ABSTRACT An apparatus for bonding ashoe lining with a shank upper material, one of which is provided with apressure-activated adhesive cement, which comprises bottom mold meansfor supporting the lining and shank material to be bonded; an upper moldmeans having an air intake means and an elastic means secured to saidupper mold to define a chamber in communication with said air intakemeans, said chamber being expanded by introducing air through saidintake means to press the elastic means against the shoe lining andshank material to effect bonding therebetween.

10 Claims, 2 Drawing Figures Pmemmwl Hm 3.757. 313

SHEET 2 OF 2 INVENTOR ERICH BETKE 004 QMfQMQJLL' 4 Mi ATTORNEYS 1 IAPPARATUS FOR CEMENTING TOGETHER CUT-TO-SIZE SHANK UPPER MATERIAL Thepresent invention relates to an apparatus for the cementing ofcut-to-size shoe lining, preferably provided with an activated fusionadhesive, to a cut-to-size shank upper material, said apparatus having ahorizontally extensible base plate with a supporting bottom mold and anupper hood which fits over the mold.

In particular, this invention contemplates an apparatus for cementingshoe linings of a predetermined size with shank upper materials ofcorresponding predetermined sizes which comprises a bottom supportingmold for the material to be bonded, said mold being exchangeablyattached to a horizontal base plate and being assembled in the manner ofbuilding blocks from individual units; a vertically reciprocating, rigidhood having a centrally disposed air feed pipe and adapted to conform tothe contours of the bottom supporting mold, and an elastic sheet havinga thickness of several millimeters, said sheet being carried by the hoodin a loosely sagging manner and being mounted in an airtight manner overan inner chamber formed in the hood by means of screws and metallicstrips.

- Advantageously, the hood carries at the rear a partial cover platehaving a cutout portion that is suitably fashioned to be somewhat widerthan the transverse or cross-sectional profile of the building-block orsupporting mold.

The building-block mold formed of wood, plastic, or metal is, in eachcase, made up of two parts. The upper part, which 'is also called theexploding or fragmented part, can be readily exchanged; whereas thelower part or base portion, is in most cases utilized in the same shape.The exchangeable fragmented parts differ from one another by havingupper faces or surfaces of varying angles of inclination, rangingpreferably between 20 and 70.

The shaping pad proper for effecting the pressure on the shoe shanksections to be laminated consists of a highly elastic rubber sheetpreferably having a thickness of, for example, 5 mm. In contrast topressure pads heretofore known, the present invention resides, interalia, in that its material is highly elastic, since this feature inparticular provides the prerequisites for a foldfree or crease-freepressing of the materials to be laminated in conjunction with the shapeof the hood. The hood provides an approximate negative mold with respectto the building-block mold, specifically in the lower zone at a'spacingof, for example, 25 mm. between these molds.

Another essential feature is that the air intake pipe is disposed in thecenter of the counterpressure mold or hood, whereby the pressure on thebuilding-block mold becomes effective, first of all, in the center andinitially fixes the shoe shank section to be laminated at this point.The pressure then increases toward the sides from the top toward thebottom, thus smoothing the laminating section and in this way preventingthe formation of creases with certainty. Even shank sections providedwith buckles, buttons, bows, straps, or the like can be joinedflawlessly to the shoe lining by the use of the apparatus of thisinvention.

In the initial condition, the building-block mold is extended and thecounterpressure mold or hood is moved to its top position by appropriatemachine support including actuating means for moving the molds togetherThis mode of operation ensures that the punched-out shoe lining and shoeupper sections fixed together by hand can be placed flawlessly, withoutany impediment onto the building-block mold, this mold having beencomposed in accordance with the shank sections to be laminated to thelinings. After the machine has been turned on, the base plate with thebuilding-block mold is moved underneath the counterpressure mold and, atthe same time, the counter-pressure mold descends, and air is blown intospace formed between the elastic sheet and the counterpressure mold. Bythis exactly coordinated operating procedure, a reduction of the totalpressing time to 1-5 seconds is attained, wherein the pressure providedby the counterpressure mold is to range between 0.5 and 3 atmospheresgauge.

During the restoration of the apparatus into the starting position,which is especially advantageous for removing the pressed shoe shankfrom the building-block mold, three process steps likewise take placechronologically, namely the discharge of air from the counterpressuremold, the raising of the counterpressure mold, and the horizontalextension of the base plate with the building-block mold.

The apparatus of this invention will be further understood by thefollowing detailed description of one of its embodiments and to theaccompanying drawings in which: v

FIG. 1 is a view showing a verticallongitudinal section through theapparatus of the invention, and

FIG. 2 is a rear view of the apparatus taken in the direction of thearrow, wherein the mounting means of a machine support are notillustrated.

In FIG. 1, reference numeral 1 designates support mountings of the hood2 at the machine support for effecting the upward and downward movementof the hood. Numeral 2a indicates the lower zones of the hood 2,extending in parallel to the upper surface of the bottom supportingmold. Air intake pipe 3 is located centrally in the hood. The rubbersheet 4 is attached to the hood by screws 5. The supporting orbuilding-block mold is provided with a bottom portion of part 6.Reference numeral 7 designates expanding or exploding molds or moldelements (I) through (X). It will be ap-. preciated thatFIG. 1schematically shows the relative position of each of the different moldelements; whereas in use only one of these moldelements willzbesecuredto" the bottom portion 6, depending on the shape of the shank materialto be bonded. Screws 8 are provided for fastening the lower part of thebuilding I block mold to the horizontal base plate 11, and mounting pins9 for attaching each of the exchangeable mold elements are providedbetween the elements and part i 6. The left-hand end of the hood carriesa partial cover plate 10 which defines a space between hood 2 and mold6, 7, as for example, indicated in FIG. 2.

A cut-to-size shank material and a punched-out lining having anadhesive, e.g. a pressure sensitive adhesive, are placed on the bottommold with the lining adjacent to the upper surface of the bottom mold.Theh the hood 2 is placed on top of the bottom mold and air introducedinto the inner chamber formed by sheet 4 via intake pipe 3 expands thechamber causing sheet 4 to press against the shank material therebybonding the lining thereto.

What is claimed is:

1. An apparatus for bonding a shoe lining to a shank upper material, oneof which is provided with an adhesive cement, which comprises bottommold means for supporting the lining and shank material to be bonded; anupper mold means including a hood shaped to conform to the contours ofthe bottom mold means and an air intake means disposed centrally in saidhood; and an elastic means secured to said upper mold means forexpanding against the shoe lining and shank material to effect bondingtherebetween upon the introduction of air through said air intake meanswherein the elastic means expands initially against a center portion ofthe shoe lining and shank material supported on said bottom mold meansand thereafter sideways, thereby providing a crease-free bond of theshoe lining and the shank material.

2. The apparatus of claim 1, wherein said bottom mold means includes atwo-part bottom mold secured to a horizontally extensible base plate.

3, The apparatus of claim 1, wherein said bottom mold is formed from anupper exchangeable mold element having an upper surface disposed at anangle of inclination, and a lower part adapted to be secured to saidupper mold element.

4. The apparatus of claim 3, wherein the angle of inclination of theupper surface of said upper mold element is selected from the range of20 to 5. The apparatus of claim 1, wherein the elastic means comprises arubber sheet.

6. The apparatus of claim 1, wherein the hood carries a partial coverplate at the rear having a cut-out portion suitably fashioned to bewider than the transverse profile of the bottom mold means.

7. The apparatus of claim 1, wherein the air intake means comprises apipe centrally located in said hood.

8. The apparatus of claim 7, wherein the elastic means comprises arubber sheet secured to the outer periphery of said hood to define saidchamber.

9. The apparatus of claim 8, wherein the sheet has a thickness ofseveral millimeters and is mounted to said hood by screws in an airtightmanner.

10. The apparatus of claim 1, wherein the elastic means is carried bythe upper mold means in a loosely sagging manner.

1. An apparatus for bonding a shoe lining to a shank upper material, oneof which is provided with an adhesive cement, which comprises bottommold means for Supporting the lining and shank material to be bonded; anupper mold means including a hood shaped to conform to the contours ofthe bottom mold means and an air intake means disposed centrally in saidhood; and an elastic means secured to said upper mold means forexpanding against the shoe lining and shank material to effect bondingtherebetween upon the introduction of air through said air intake meanswherein the elastic means expands initially against a center portion ofthe shoe lining and shank material supported on said bottom mold meansand thereafter sideways, thereby providing a crease-free bond of theshoe lining and the shank material.
 2. The apparatus of claim 1, whereinsaid bottom mold means includes a two-part bottom mold secured to ahorizontally extensible base plate.
 3. The apparatus of claim 1, whereinsaid bottom mold is formed from an upper exchangeable mold elementhaving an upper surface disposed at an angle of inclination, and a lowerpart adapted to be secured to said upper mold element.
 4. The apparatusof claim 3, wherein the angle of inclination of the upper surface ofsaid upper mold element is selected from the range of 20* to 70*.
 5. Theapparatus of claim 1, wherein the elastic means comprises a rubbersheet.
 6. The apparatus of claim 1, wherein the hood carries a partialcover plate at the rear having a cut-out portion suitably fashioned tobe wider than the transverse profile of the bottom mold means.
 7. Theapparatus of claim 1, wherein the air intake means comprises a pipecentrally located in said hood.
 8. The apparatus of claim 7, wherein theelastic means comprises a rubber sheet secured to the outer periphery ofsaid hood to define said chamber.
 9. The apparatus of claim 8, whereinthe sheet has a thickness of several millimeters and is mounted to saidhood by screws in an airtight manner.
 10. The apparatus of claim 1,wherein the elastic means is carried by the upper mold means in aloosely sagging manner.